feat: Add full-screen receipt viewer, display trip participants in calendar, and restrict trip management options to creator.

lib/components/account/expense_detail_dialog.dart

@@ -322,7 +322,40 @@ class ExpenseDetailDialog extends StatelessWidget {
                                   color: Colors.transparent,
                                   child: InkWell(
                                     onTap: () {
-                                      // TODO: Show full screen image
+                                      showDialog(
+                                        context: context,
+                                        builder: (context) => Dialog(
+                                          backgroundColor: Colors.transparent,
+                                          insetPadding: EdgeInsets.zero,
+                                          child: Stack(
+                                            alignment: Alignment.center,
+                                            children: [
+                                              InteractiveViewer(
+                                                minScale: 0.5,
+                                                maxScale: 4.0,
+                                                child: Image.network(
+                                                  expense.receiptUrl!,
+                                                  fit: BoxFit.contain,
+                                                ),
+                                              ),
+                                              Positioned(
+                                                top: 40,
+                                                right: 20,
+                                                child: IconButton(
+                                                  icon: const Icon(
+                                                    Icons.close,
+                                                    color: Colors.white,
+                                                    size: 30,
+                                                  ),
+                                                  onPressed: () => Navigator.of(
+                                                    context,
+                                                  ).pop(),
+                                                ),
+                                              ),
+                                            ],
+                                          ),
+                                        ),
+                                      );
                                     },
                                   ),
                                 ),

lib/components/home/calendar/calendar_page.dart

@@ -7,6 +7,8 @@ import '../../../models/activity.dart';
 import '../../../blocs/activity/activity_bloc.dart';
 import '../../../blocs/activity/activity_state.dart';
 import '../../../blocs/activity/activity_event.dart';
+import '../../../repositories/user_repository.dart';
+import '../../../models/user.dart';
 
 class CalendarPage extends StatefulWidget {
   final Trip trip;
@@ -93,7 +95,7 @@ class _CalendarPageState extends State<CalendarPage> {
         actions: [
           IconButton(
             icon: Icon(Icons.people, color: theme.colorScheme.onSurface),
-            onPressed: () {}, // TODO: Show participants
+            onPressed: () => _showParticipantsDialog(context),
           ),
         ],
       ),
@@ -419,4 +421,67 @@ class _CalendarPageState extends State<CalendarPage> {
     }
     return Icons.place;
   }
+
+  void _showParticipantsDialog(BuildContext context) {
+    showDialog(
+      context: context,
+      builder: (context) => AlertDialog(
+        title: const Text('Participants'),
+        content: SizedBox(
+          width: double.maxFinite,
+          child: FutureBuilder<List<User>>(
+            future: UserRepository().getUsersByIds([
+              ...widget.trip.participants,
+              widget.trip.createdBy,
+            ]),
+            builder: (context, snapshot) {
+              if (snapshot.connectionState == ConnectionState.waiting) {
+                return const Center(child: CircularProgressIndicator());
+              }
+
+              if (snapshot.hasError) {
+                return const Center(child: Text('Erreur de chargement'));
+              }
+
+              final users = snapshot.data ?? [];
+              if (users.isEmpty) {
+                return const Center(child: Text('Aucun participant trouvé'));
+              }
+
+              return ListView.builder(
+                shrinkWrap: true,
+                itemCount: users.length,
+                itemBuilder: (context, index) {
+                  final user = users[index];
+                  final isCreator = user.id == widget.trip.createdBy;
+
+                  return ListTile(
+                    leading: CircleAvatar(
+                      backgroundImage: user.profilePictureUrl != null
+                          ? NetworkImage(user.profilePictureUrl!)
+                          : null,
+                      child: user.profilePictureUrl == null
+                          ? Text(
+                              '${user.prenom.isNotEmpty ? user.prenom[0] : ''}${user.nom.isNotEmpty ? user.nom[0] : ''}'
+                                  .toUpperCase(),
+                            )
+                          : null,
+                    ),
+                    title: Text(user.fullName),
+                    subtitle: isCreator ? const Text('Organisateur') : null,
+                  );
+                },
+              );
+            },
+          ),
+        ),
+        actions: [
+          TextButton(
+            onPressed: () => Navigator.pop(context),
+            child: const Text('Fermer'),
+          ),
+        ],
+      ),
+    );
+  }
 }

lib/components/home/calendar/calendar_page.dart_snippet

@@ -0,0 +1,59 @@
+  void _showParticipantsDialog(BuildContext context) {
+    showDialog(
+      context: context,
+      builder: (context) => AlertDialog(
+        title: const Text('Participants'),
+        content: SizedBox(
+          width: double.maxFinite,
+          child: FutureBuilder<List<User>>(
+            future: UserRepository().getUsersByIds([
+              ...widget.trip.participants,
+              widget.trip.createdBy,
+            ]),
+            builder: (context, snapshot) {
+              if (snapshot.connectionState == ConnectionState.waiting) {
+                return const Center(child: CircularProgressIndicator());
+              }
+              
+              if (snapshot.hasError) {
+                return const Center(child: Text('Erreur de chargement'));
+              }
+
+              final users = snapshot.data ?? [];
+              if (users.isEmpty) {
+                return const Center(child: Text('Aucun participant trouvé'));
+              }
+
+              return ListView.builder(
+                shrinkWrap: true,
+                itemCount: users.length,
+                itemBuilder: (context, index) {
+                  final user = users[index];
+                  final isCreator = user.id == widget.trip.createdBy;
+                  
+                  return ListTile(
+                    leading: CircleAvatar(
+                      backgroundImage: user.photoUrl != null
+                          ? NetworkImage(user.photoUrl!)
+                          : null,
+                      child: user.photoUrl == null
+                          ? Text(user.initials)
+                          : null,
+                    ),
+                    title: Text(user.fullName),
+                    subtitle: isCreator ? const Text('Organisateur') : null,
+                  );
+                },
+              );
+            },
+          ),
+        ),
+        actions: [
+          TextButton(
+            onPressed: () => Navigator.pop(context),
+            child: const Text('Fermer'),
+          ),
+        ],
+      ),
+    );
+  }

lib/components/home/show_trip_details_content.dart

@@ -1,4 +1,5 @@
 import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
 
 import 'package:flutter_bloc/flutter_bloc.dart';
 import 'package:travel_mate/blocs/trip/trip_bloc.dart';
@@ -589,13 +590,25 @@ class _ShowTripDetailsContentState extends State<ShowTripDetailsContent> {
       shape: const RoundedRectangleBorder(
         borderRadius: BorderRadius.vertical(top: Radius.circular(20)),
       ),
-      builder: (context) => Container(
+      builder: (context) {
+        return BlocBuilder<UserBloc, user_state.UserState>(
+          builder: (context, state) {
+            final currentUser = state is user_state.UserLoaded
+                ? state.user
+                : null;
+            final isCreator = currentUser?.id == widget.trip.createdBy;
+
+            return Container(
               padding: const EdgeInsets.all(20),
               child: Column(
                 mainAxisSize: MainAxisSize.min,
                 children: [
+                  if (isCreator) ...[
                     ListTile(
-              leading: Icon(Icons.edit, color: theme.colorScheme.primary),
+                      leading: Icon(
+                        Icons.edit,
+                        color: theme.colorScheme.primary,
+                      ),
                       title: Text(
                         'Modifier le voyage',
                         style: theme.textTheme.bodyLarge?.copyWith(
@@ -617,22 +630,59 @@ class _ShowTripDetailsContentState extends State<ShowTripDetailsContent> {
                       leading: const Icon(Icons.delete, color: Colors.red),
                       title: Text(
                         'Supprimer le voyage',
+                        style: theme.textTheme.bodyLarge?.copyWith(
+                          color: Colors.red,
+                        ),
+                      ),
+                      onTap: () {
+                        Navigator.pop(context);
+                        _confirmDeleteTrip();
+                      },
+                    ),
+                    const Divider(),
+                  ],
+                  ListTile(
+                    leading: Icon(
+                      Icons.share,
+                      color: theme.colorScheme.onSurface,
+                    ),
+                    title: Text(
+                      'Partager le code',
                       style: theme.textTheme.bodyLarge?.copyWith(
                         color: theme.colorScheme.onSurface,
                       ),
                     ),
                     onTap: () {
                       Navigator.pop(context);
-                _showDeleteConfirmation();
+                      // Implement share functionality
+                      if (_group != null) {
+                        // Use share_plus package to share the code
+                        ScaffoldMessenger.of(context).showSnackBar(
+                          SnackBar(
+                            content: Text('ID du groupe : ${_group!.id}'),
+                            action: SnackBarAction(
+                              label: 'Copier',
+                              onPressed: () {
+                                Clipboard.setData(
+                                  ClipboardData(text: _group!.id),
+                                );
                               },
                             ),
-          ],
-        ),
                           ),
                         );
                       }
+                    },
+                  ),
+                ],
+              ),
+            );
+          },
+        );
+      },
+    );
+  }
 
-  void _showDeleteConfirmation() {
+  void _confirmDeleteTrip() {
     final theme = Theme.of(context);
 
     showDialog(

lib/repositories/user_repository.dart

@@ -150,4 +150,43 @@ class UserRepository {
       throw Exception('Impossible de changer le mot de passe');
     }
   }
+
+  // Récupérer plusieurs utilisateurs par leurs IDs
+  Future<List<User>> getUsersByIds(List<String> uids) async {
+    if (uids.isEmpty) return [];
+
+    try {
+      // Firestore 'in' query supports up to 10 values.
+      // If we have more, we need to split into chunks.
+      List<User> users = [];
+
+      // Remove duplicates
+      final uniqueIds = uids.toSet().toList();
+
+      // Split into chunks of 10
+      for (var i = 0; i < uniqueIds.length; i += 10) {
+        final end = (i + 10 < uniqueIds.length) ? i + 10 : uniqueIds.length;
+        final chunk = uniqueIds.sublist(i, end);
+
+        final querySnapshot = await _firestore
+            .collection('users')
+            .where(FieldPath.documentId, whereIn: chunk)
+            .get();
+
+        for (var doc in querySnapshot.docs) {
+          final data = doc.data();
+          users.add(User.fromMap({...data, 'id': doc.id}));
+        }
+      }
+
+      return users;
+    } catch (e, stackTrace) {
+      _errorService.logError(
+        'UserRepository',
+        'Error retrieving users by IDs: $e',
+        stackTrace,
+      );
+      return [];
+    }
+  }
 }

lib/services/notification_service.dart

@@ -1,3 +1,4 @@
+import 'dart:convert';
 import 'dart:io';
 import 'package:cloud_firestore/cloud_firestore.dart';
 import 'package:firebase_messaging/firebase_messaging.dart';
@@ -49,7 +50,14 @@ class NotificationService {
       onDidReceiveNotificationResponse: (details) {
         // Handle notification tap
         LoggerService.info('Notification tapped: ${details.payload}');
-        // TODO: Handle local notification tap if needed, usually we rely on FCM callbacks
+        if (details.payload != null) {
+          try {
+            final data = json.decode(details.payload!) as Map<String, dynamic>;
+            _handleNotificationTap(data);
+          } catch (e) {
+            LoggerService.error('Error parsing notification payload', error: e);
+          }
+        }
       },
     );